The term PLANT MARINE is composed of two words, ALGA and PLANT. ALGA is a type of PLANT that lives in the ocean and other bodies of water. It is an aquatic organism that is typically photosynthetic and can range from single-celled to multicellular forms. Algae are important primary producers in aquatic ecosystems, providing food for many species of fish, shellfish, and other marine organisms. PLANT, on the other hand, is a living organism that is capable of photosynthesis and growth. Plants are essential for life on Earth, as they produce oxygen and provide food and shelter for many species. Together, these two words form the term PLANT MARINE, which refers to plants that live in the ocean.